Trouble conceiving linked to intense workouts

March 16, 2012 2:20:18 PM PDT

March 16, 2012 --

If you're having trouble conceiving, you might try to lighten up on the heavy workouts.

That's the conclusion of a study published in the journal "fertility and sterility." It finds that healthy women who do such high-intensity exercise as running, cycling and aerobics may be cutting down the odds of conception.

One exception: among overweight and obese women, high-intensity exercise was associated with a shorter time to pregnancy.

Such moderate exercise as walking and golfing was associated with shorter time-to-pregnancy, suggesting all women seeking pregnancy may benefit from *some* exercise